counterattack

1. V-I If you counterattack, you attack someone who has attacked you. 反击

The security forces counterattacked the following day and quelled the unrest. 安全部队第二天进行了反击，平息了骚乱。

2. N-COUNT Counterattack is also a noun. 反攻

The army began its counterattack this morning. 今天早晨部队开始了反攻。